Andrew's git - gitweb.git/blob

   1#ifndef GIT_COMPAT_UTIL_H
   2#define GIT_COMPAT_UTIL_H
   3
   4#ifndef FLEX_ARRAY
   5#if defined(__GNUC__) && (__GNUC__ < 3)
   6#define FLEX_ARRAY 0
   7#else
   8#define FLEX_ARRAY /* empty */
   9#endif
  10#endif
  11
  12#include <unistd.h>
  13#include <stdio.h>
  14#include <sys/stat.h>
  15#include <fcntl.h>
  16#include <stddef.h>
  17#include <stdlib.h>
  18#include <stdarg.h>
  19#include <string.h>
  20#include <errno.h>
  21#include <limits.h>
  22#include <sys/param.h>
  23#include <netinet/in.h>
  24#include <sys/types.h>
  25#include <dirent.h>
  26
  27#ifdef __GNUC__
  28#define NORETURN __attribute__((__noreturn__))
  29#else
  30#define NORETURN
  31#ifndef __attribute__
  32#define __attribute__(x)
  33#endif
  34#endif
  35
  36/* General helper functions */
  37extern void usage(const char *err) NORETURN;
  38extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
  39extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
  40
  41#ifdef NO_MMAP
  42
  43#ifndef PROT_READ
  44#define PROT_READ 1
  45#define PROT_WRITE 2
  46#define MAP_PRIVATE 1
  47#define MAP_FAILED ((void*)-1)
  48#endif
  49
  50#define mmap gitfakemmap
  51#define munmap gitfakemunmap
  52extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset);
  53extern int gitfakemunmap(void *start, size_t length);
  54
  55#else /* NO_MMAP */
  56
  57#include <sys/mman.h>
  58
  59#endif /* NO_MMAP */
  60
  61#ifdef NO_SETENV
  62#define setenv gitsetenv
  63extern int gitsetenv(const char *, const char *, int);
  64#endif
  65
  66#ifdef NO_STRCASESTR
  67#define strcasestr gitstrcasestr
  68extern char *gitstrcasestr(const char *haystack, const char *needle);
  69#endif
  70
  71static inline void *xmalloc(size_t size)
  72{
  73        void *ret = malloc(size);
  74        if (!ret && !size)
  75                ret = malloc(1);
  76        if (!ret)
  77                die("Out of memory, malloc failed");
  78        return ret;
  79}
  80
  81static inline void *xrealloc(void *ptr, size_t size)
  82{
  83        void *ret = realloc(ptr, size);
  84        if (!ret && !size)
  85                ret = realloc(ptr, 1);
  86        if (!ret)
  87                die("Out of memory, realloc failed");
  88        return ret;
  89}
  90
  91static inline void *xcalloc(size_t nmemb, size_t size)
  92{
  93        void *ret = calloc(nmemb, size);
  94        if (!ret && (!nmemb || !size))
  95                ret = calloc(1, 1);
  96        if (!ret)
  97                die("Out of memory, calloc failed");
  98        return ret;
  99}
 100
 101static inline ssize_t xread(int fd, void *buf, size_t len)
 102{
 103        ssize_t nr;
 104        while (1) {
 105                nr = read(fd, buf, len);
 106                if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 107                        continue;
 108                return nr;
 109        }
 110}
 111
 112static inline ssize_t xwrite(int fd, const void *buf, size_t len)
 113{
 114        ssize_t nr;
 115        while (1) {
 116                nr = write(fd, buf, len);
 117                if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 118                        continue;
 119                return nr;
 120        }
 121}
 122
 123/* Sane ctype - no locale, and works with signed chars */
 124#undef isspace
 125#undef isdigit
 126#undef isalpha
 127#undef isalnum
 128#undef tolower
 129#undef toupper
 130extern unsigned char sane_ctype[256];
 131#define GIT_SPACE 0x01
 132#define GIT_DIGIT 0x02
 133#define GIT_ALPHA 0x04
 134#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 135#define isspace(x) sane_istest(x,GIT_SPACE)
 136#define isdigit(x) sane_istest(x,GIT_DIGIT)
 137#define isalpha(x) sane_istest(x,GIT_ALPHA)
 138#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 139#define tolower(x) sane_case((unsigned char)(x), 0x20)
 140#define toupper(x) sane_case((unsigned char)(x), 0)
 141
 142static inline int sane_case(int x, int high)
 143{
 144        if (sane_istest(x, GIT_ALPHA))
 145                x = (x & ~0x20) | high;
 146        return x;
 147}
 148
 149#ifndef MAXPATHLEN
 150#define MAXPATHLEN 256
 151#endif
 152#endif